If you’re like me, you’ve been baking up a storm of holiday treats. For many of us, those holiday treats come along with the dreaded holiday weight gain.
I posted 5 general tips back in November for how to avoid gaining weight over the holidays, but today I’m covering a scientific study on how dieting affects holiday weight gain–and what it means for you.

The Study
In this study, the researchers looked at how much weight was gained over the holidays by dieters versus normal controls (nondieters). And, more importantly, what kinds of dieting habits these groups had.
The dieters were people who had successfully lost weight in the past and kept it off for years–so they really knew how to diet. Before the holiday, many of them reported having “extremely strict” holiday diet and exercise plans in place: they had solid plans to control their portions, cut out treats, and exercise like crazy. Many of them also lost weight before the holidays to have a safety net in the event of holiday weight gain.
Sounds like a lot of people around November, right?
Not a single one of the 100 nondieters, on the other hand, reported having strict diet or exercise plans. None of them reported losing any weight to prepare for the holidays, either.
So the dieters were completely focused on weight loss, had strict plans in place to do that, and even preemptively lost weight to have a holiday safety net. And the nondieters didn’t care about weight or dieting much at all.
Guess who gained more weight?
The dieters.
During the holiday, the dieters reported exercising much more, and successfully sticking to their strict diet plans. They followed self-imposed rules, like only eating at home and not allowing snacking after dinner. They intentionally stopped eating before they were full, focused on their portions, and weighed themselves more often.
And yet, they gained weight: almost half of them gained more than 2lbs. Only 15% of the nondieters, on the other hand, gained weight.
The kicker is that even a month later, in February, three times as many dieters were still holding onto that holiday weight than nondieters.
But why did this happen?
The researchers found that paying less attention to their weight and dieting over the holidays predicted more weight gain in the dieters. And yet, the dieters were still paying more attention to their weight and diet overall than the nondieters, so that can’t explain why they gained more.
This seemingly paradoxical result really shows how dieting affects you: if you’re used to dieting, then the second you take a break from completely obsessing over your weight and diet plans, you start to gain weight.

So, what does this mean for you?
The only way dieting really works in the long term is if you maintain complete control 100% of the time, with no binges or overeating or slip ups. And that isn’t realistic. It’s usually more like a cycle of doing well for a little while, then overeating, then trying to make up for it by dieting more strictly, which leads to binging… rinse and repeat.
Dieting just doesn’t work in the long term.
So what can you do?
Be like the nondieters: try intuitive eating (here’s my post on how to do that). Don’t focus on your weight. Don’t make strict diet plans. Don’t impose eating or exercise rules on yourself. Instead, just learn to tune into your body’s signals so you can eat when you’re hungry and stop when you’re full–that’s it!
It takes some time to escape from a diet mentality and the cycle of strict dieting and slip-ups, but it is so worth it.
And if you want to lose weight, just focus on eating whole, plant-based foods. (No need to cut out treats though!) There’s a ton of research that shows that eating this way, without any dieting, leads to effortless weight loss.
The holidays should be a time that you can spend focusing on loved ones, relaxation, and self-care. Not a time that you have to spend all your mental energy on keeping up your diet.